Lens-holder.



H. s. MILLS. LENS HOLDER.

APPLICATION FILED AUG. 7, 1905.

PATENTED DEG.5,1905.

2 SHEETS-41133! 1.

0 flZerZ unrrnn TES PATENT OFFICE.

, HEnBERTs. MILLS, or CHICAGO, ILLINOIS.

LENS-HOLDER.

To'all whom it may concern." I

Be it known that LHERBERT' S. MILLS, a' citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Lens-Holder's,of which the following is a specification.

The object of my inventionis to provide a construction of holder 'for the lenses used on stereoscopes of the class in which pictures-to beexhibitedare inclosed in a case to which the lens-holder is secured, andparticularly of the coin controlled picture exhibiting variety, whereby the lenses may be readily'released from their confined position tojpermit convenient access to them for cleaning. In the coinoperated picture-exhibitors referred to it is the more common practice to secure the lenses in'place immovably on the case, thereby ren-. dering accessto their inner surfaces, which become blurred with-use, for cleaning pur-,

poses practically possible only through the case by opening it,-and the operation is attended with considerable difiiculty and moon-.

venienc'e. My improvement avoids this obectlon by rendering the lenses readily releasable from their operative position in the case and as'readily replaceable therein to permit free access to all parts of the lenses for cleaning them.

Referring to the accompanying drawings, Figurel is a view of my improved device in front elevation. 'Fig. 2 shows the-same regarded from underneath Fig. -1. Fig. 3 is a top view representing the side of the device opposite that presented in Fig. 2 and showing the unlocking-key injplace'; Fig. 4, a View of the holder in rear elevation'o'r regarded from its inner end with the lenses removed to disclose details which would be hiddenby their containing-frame; and Fig. 5, a section taken at the line 5 in Fig. land viewed in the direction of the arrow.

A denotes the holder as a whole, and B B are the stereoscopic lenses in the frame B, usually formed of wood. The holder comprises as its preferred construction for embodying my invention a bed-plate A, to be permanently secured in place'on a picture-inclosing case (not shown) and on which the lenses are seated, and a shield A", adapted to be releasably locked on the bed-plate to cover the lens-frameand' secure it in the holder. The bed-plate contains an opening a, preferably of the shape of the lens-frame, and has depending adjacent to the ends of the open- Specification of Letters Patent. Application filed August 7, 1905. Serial No. 273,043-

Patented Dec. 5, 1905.

ing brackets Z), on which the frame B rests at its ends, and lugs 0, depending from the bedplate at opposite sides of the opening therein, form stops to confine the lens-frame at its upper and lower edges. The studsd d, shown projecting from the inner face of the plate A, are provided to be let into suitable openings in the aforesaid case for fastening the holder in place in a well-known manner. The bedplate has curved projections e 6 extending coincident with each other from opposite sides of the transverse center of the opening a, and the inner edges of these projections are concaved to form arc-shaped recesses e e, for the purpose hereinafter described. In one (the uppermost) of the projectionse is journaled an arbor f, carrying on its inner end a tongue g and surrounded about its outer end by a socket f to receive a key (3, applied to the arbor for turning the tongue.

The shield'A which is preferably of the usual general form, is provided about its base with an outwardly-projecting seating-flange h, at which it rests upon the bed-plate, the flange having curved projections'z' e to register with the bed-plate projections e and cover the recesses e in the latter. About the open bottom of the shield, the opening in which is of smaller dimensions than those of the lensframe, is formed a marginal flange 7a of the shape of the opening, which is shown to be rectangular. On the upper side of the flange his formed a recess h, Fig. 5, to register with the arbor f, and on the opposite lower side of said flange are provided lugs Z Z to pass under or behind the adjacent edge of the bed-plate. To assemble the parts, with the bed-plate secured in position in the case and the tongue 9 turned to the dotted position in Fig. 4 against a .stop '0, limiting its movement, the lens-frame is introduced through the opening a upon its seat afforded by the brackets b, the operator holding the frame at its sides between his thumb and a finger, which may enter the opening a at the recesses 6', both for inserting and withdrawing said frame. Thereupon the shield member of the holderi's applied by introducing the lugs "Z under the inner edge'of is retained in the possession of those having authority to use it to prevent its unauthorized use. To remove the lenses, as for cleaningthem, the key is applied to turn the tongue g out of engagement with the recess is, which releases the shield member, permitting it-to be removed from obstructing the withdrawal of the lenses, which may thereupon be taken out in the manner observed in introducing them upon their seat.

What I claim as new, and desire to secure" by Letters'Patent, is

1. In combination, a lens-holder for a picture-exhibiting machine of the character described, comprising a bed-plate adapted to be fastened on the machine-case and provided with an opening, a shield upon the bed-plate,

plate over said opening and movable into and out of operative position, and a lock on said thorized removal, for the purpose set forth.

2. In combination, a lens-holder for a pic ture-exhibitingmachine of the character described, comprising a bed-plate adapted to be fastened on the machine-case and provided with an opening, a shield releasably connected with the bedplate, and a frame carrying lenses seated on the bed-plate over said openposition, and a lock on said holder for securing the lenses against unauthorized removal, for the purpose set forth. 7

3. In combination, a lens-holder for a picture-exhibiting machine of the character described, comprising a bed-plate adapted to be fastened on the machine-case and provided with an opening, and a shield releasably connected with the bed-plate,'a frame carrying lenses seated on the bed-plate over said opening and confined on its seat by the shield, and means for locking the shield on the bed-plate.

4:. In combination, a lens-holder for a picture-exhibiting machine of the character described, comprising a bed-plate adapted to be fastened on the machine-case and provided with an opening and with seating-brackets and stop-lugs extending from its inner face, and a shield releasably connected with the bedplate, a frame carrying lenses, seated on said brackets and confined in place by the shield,

ing from the inner face of the bed-plate, and

a shield provided with a base-flange at which it rests on the bed-plate and having pro ections for covering said recesses, a frame car- 1 rying lenses seated on said brackets and confined in place by the shield and means for locking the shield on the bed-plate.

and a frame carrying lenses seated on the bed- 6. In combination a lens-holder for a picture-exhibiting machine of the character described, comprising a bed-plate adapted to be holder for securing the lenses against unaufastened on the machine-case and provided with an opening forming recesses at opposite sides, seating-brackets and stop-lugs extending from the inner face of the bed-plate and j a key-arbor carrying a tongue, and a shield shaving a marginal flange about its opening provided with a recess to receive said tongue, and a frame carrying lenses, seated on said j brackets and confined thereon by the shield.

ing and movable into and out of operative 5 7. In combination, a lens-holder for a picture-exhibiting machine of the character described, comprising a bed-plate adapted to be lfastened on the machine-case and provided with an opening forming recesses at opposite sides, seating-brackets and stop-lugs extending from the inner face of the bed-plate and 3 a key-arbor carrying a tongue, and a shield provided with a base-flange at whlch it rests on the bed-plate and having projections for covering said recesses, and with a marginal flange about the opening in the shield-base provided on one side with a recess to receive said tongue and on 1ts opposlte side with lugs to engage the adjacent edge of the bed-plate opening, and a frame carrying lenses, seated on said brackets and confined therein by the shield.

HERBERT S. MILLS. In presence of J. H. LANDES, A. U. THORIEN. 

